Alexandre Jean Yersin (* 22 September 1863 with Aubonne, Switzerland; "† 28 February 1943 in Nha Trang, Viet Nam) was a Swiss-French physician and bacteriologist, who discovered the exciter of the plague, Yersinia pestis. In honours the entire bacteria kind is called Yersinia.

To academic years in Lausanne and Marburg Yersin goes to Paris and works on Institut Louis Pasteur, among other things together with Roux over Diphtherie, it proves at it the Diphtherietoxin. It attains a doctorate 1888 over experimental Tuberkulose and attends the bakteriologischen course of Robert cook in Berlin. In order to be able to exercise in France the occupation of physician, he becomes French citizen.

In Indochina he works starting from 1890 as a ship's doctor and undertakes there Forschungsreisen. When the plague wave 1894 the southChinese coast spreading from that Mongolia reaches itself, French government and Institut Pasteur send it to Hong Kong, in order to find the up to then still unknown cause of the illness. At the same time and with the same goal there a Japanese group of researchers under the direction of Shibasaburo Kitasato works. Although Yersin is more badly equipped and is obstructed by the English colonial authorities in its work, in June 1894 the isolation of the exciter from stricken lymph node (Bubonen) of plague-dead succeeds to him and the transmission of the illness on mice and guinea pigs. That it in contrast to Kitasatos group not had an incubator and its bacterial cultures with normal air temperature in a bamboo hut must, thereby a lucky circumstance is, on laboratory conditions increases Yersinia pestis at temperatures, which are lower than the human better.

Yersin prove also experimentally that the plague exciter identified by it is responsible for the massive rat dying at the same time arisen in Hong Kong likewise. Thus the statement was only missing for the complete clearing-up of the substantial members of the infection chain that plague epidemic diseases "“jump over"” by the bite of the rat flea of the animal on humans. Three years of late Masanori Ogata and Paul Louis Simond in Bombay should discover this. The exciter, which Kitasato in Hong Kong isolates and describes as a causer of the plague, proves later than coincidental Begleitkeim of the illness, yet Kitasato is considered for a long time as (with) a discoverer of the plague exciter. 1970 receive the bacterium to the today's names, in memory of earnings/services Yersins.

1895 are Yersin in Paris and cooperate in the development of a welfare serum, which he uses thereafter in the far east with the treatment of plague patients, which does not show effect however with the occurrence of the plague in Bombay in the year 1897. In the following years it is concerned on behalf the colonial administration with agricultural projects in Indochina, among other things with the cultivation of Hevea brasiliensis for the production of india rubber and of Cinchona ledgeriana, which Chinarindenbaum, made of whose crust the anti-malaria means Chinin is manufactured. 1902 becomes it for two years director of the again created school for medical auxiliary personnel in Hanoi, from which the medical university comes out later. From 1904 to 1924 it leads the addresses of the institute Pasteur in Saigon and Nha Trang. It will appoint 1934 into the scientific adviser of the institute in Paris and as the honorary director and chairman of the annual general assembly of the institute appointed.

The Garrulax Yersini, a rare kind of bird occurring in Viet Nam, is designated after Yersin.

Quotations

You ask the question to me whether I estimate medical practice. Yes and no. It makes much fun for me, if I worry about, which come and over it means advice asks but I would not like to make the medicine a business, i.e. that I could never please a patient to pay me for assistance whom I can give it. I regard the medicine as priest shank similarly the office of the Seelsorgers. Of a patient payment for assistance to require, is so similarly as being said to it, money or life.

(Original) do to ME demandes SI ever prends   la pratique Oui et non. J'ai beaucoup de plaisir more soigner ceux qui viennent ME that other conseil, corn per ne voudrais pas fair de la un more c'est dire que ever pourrais jamais that other un malade de ME more payer pour soins que j'aurais pu lui thunder. Ever la comme un sacerdoce, ainsi que le pastorat. The other de l'argent pour more soigner un malade, c'est un peu lui dire la bourse ou la vie.

Related links

'' Biography ''. Archives de l'Institut Pasteur (frz.)

Literature

Stefan bends: Scourges of mankind. Culture history of the epidemics. Artemis and Winkler, Duesseldorf/Zurich 1997, ISBN 3-538-07049-0

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